讲座名称：State-of-the-art understanding of vacuum arcing phenomenon within the Compact Linear Collider project at CERN

讲座时间：2025年9月19日 上午 9:00-11:00

报告人：Flyura Djurabekova教授  芬兰赫尔辛基大学

校区：西安交通大学创新港校区

讲座地点：创新港躬行楼（3号巨构）3-2031

邀请人：孟国栋教授

Title: State-of-the-art understanding of vacuum arcing phenomenon within the Compact Linear Collider project at CERN

Time：19^th September 2025，9:00-11:00 a.m.

Venue：3-2031，Gongxing Building，I-harbor campus

Speaker：Professor Flyura Djurabekova, University of Helsinki, Finland

Inviter：Professor Guodong Meng

报告摘要：Complexity of the processes involved in vacuum arcing, or vacuum breakdown, near metal surfaces in the presence of high electric fields, make the study of this phenomenon very challenging. Within a broad international collaboration, we manage to elucidate many stages of vacuum arcing evolution with the focus on initiation of a vacuum arc in the presence of high electric fields. We have developed a theoretical model to explain processes triggering at metal surfaces under high electric fields in ultra-high vacuum. This theoretical model is developed based on vast experimental and theoretical research carried out in the project. Although the accelerating structures are working with radio-frequency electromagnetic fields, our focus is to explain the material response on high electric field, because of interaction of charged surface with applied electric field. The outline of a multiscale model includes different stages of development of vacuum arcing onset supported by corresponding experimental evidence with an emphasis on the processes that take place on metal surfaces in the presence of high electric fields in ultra-high vacuum.

报告人简介：Professor Flyura Djurabekova focuses on the field of Materials in Extreme Environments. She serves as the Head of the Materials Physics Division and the Vice-Head of the Department of Physics at the University of Helsinki. She is leading a computational material physics group at the Accelerator Laboratory of more than 20 members, including graduate students and postdoctoral researchers as well as undergraduate students and a number of visiting researchers. Her 25-years research experience revolves around multiscale modeling of various phenomena, including fundamental mechanisms of vacuum arcing under high electric fields and radiation effects in materials. She is one of the founders of the international workshop series “Mechanisms of Vacuum Arcing” which is almost annually held in different places in the world. She is also a prominent member of ISDEIV PISC. In the field of radiation effect, Prof. Djurabekova is leading the international committees of two major conferences and also a member in two more conferences.